Nonclogging nozzle for fire-extinguishing systems



Nov. 11, 1930. v D. MAPES 1,781,028

NONCLOGGING NOZZLE FOR FIRE EXTINGUISHiNG SYSTEMS Filed Oct. 30, 1928 i 7 I a a;

a In.

INVENTOR BY (EM Patented Nov. 11,1930

UNITED STATES DANIEL MAPES, OF MAMARONECK, NEW YORK, ASSIGN'OR TO WALTER KID-DE atom- IPANY, me, 015 NEW YORK, 1v. Y., A oonroRA rIon 03?- NEW YORK NONGLOGGING NOZZLE r03 rinn n xrrneuisnme SYSTEMS 7.

Application filed October so, 192s. min'n ae d.f

' Where fire extinguishing systems are installed to protect coal bunkers or other compartments in which a. considerable amount of dust, grit or other foreign matter is present, it has been found desirable to provide a device for preventing the discharge nozzles of the system from becoming clogged. After considerable study, it has been found that a highly efi'ective form of protective device for such nozzles is one that utilizesthe pressure of the fire extinguishing medium within the system for removing the protective device from the nozzles when the discharge of the medium is to be effected.

The present invention embodies an improved from of nonclogging nozzle which automatically functions upon a given pressure of the fire extinguishing medium within the system to render the nozzle operative to discharge the medium through an unobstructed path in order that. the system may func tion with maximum efficiency.

More specifically, the invention embodies an improved nozzle for fire extinguishing systems which is provided with a cover pivotally mounted in such manner that it may be positioned over the nozzle or removed therefrom in accordance with the condition of the fire extinguishing system. It is contemplated that a cylinder will be formed in the nozzle which communicates with the passage through which the fire extinguishing medium is discharged and applies the pressure of such medium to a piston which is connected to the pivotally mounted cover. Movement of the piston, therefore, servesto remove the cover from the nozzle and permit the free and unobstructed discharge of the fire extinguishing medium. i

The invention will be understood more fully in connection with the accompanying drawings, wherein:

Figure 1 is a view in front elevation show-- ing one form of the invention.

Figure 2 is a view, in section, taken on line 22 of Figure 1, and looking in the direction of the arrows. I V

Figure 3 is a view, similar to Figure 1, showing a modified form of the invention.

Figure 4 is a view, in section, taken on line Figure 3,,and looking in the directionof'the arrowsl fi @Referring to'the device shown in; Figures 1 and 2, adesignates a noZZ' 0 m6 W I threaded nipple a andra discharge aperture 4 The axial passage a throughwhich the fire extinguishing medium isdi'scharged,'is

formedwith an offset portion a which com-1 mun cates with a transverse cylinderf a The lower "extremity of this cylinder is closed by meansjof afitting a" andthe cylinder--comemanates 'withthe' passage (i leading'tothe discharge apertureu A piston bis mounted within thecylindera? and'is normally maintained in t he position shown injFigl f 2 by. means of spring bg Guiderod 'bflextends ough the fitting a and steadies the move: ment ofpistonib; A cover 0 is pivoted tothenozzflebjetwee'n arms 0' formedthereon, and is provided with anmpwardlyj and rearwardly extending arm 0 .This arm is slottedat c toreceivea pin btlmounted upon a piston rod which is secured to the piston b. Avsuitable gasket 0 I is carried with the cover 0 to providea tight joint between the cover c and the nozzle. H

"Upon th'e existanceof a suificient; pressure 1 within the fire extinguishing discharge. line, such,for example, as thepressure of the dis charging 'n'iedium, the piston Zfwill bemoved downwardly against theaction of th'e spring b' the cover 0 willlbe removed from the aperture p'ortj a may bet-formed in the cylinder wall 'to prevent building up of aback pressure by air withinjt-he cylinder and insurea ready'responsejof the piston to the pressure of the fire' extinguishing me- *Ifthe nozzle is used in locations where the cover actuating mechanism is liable tolflbe damagedfa suitable. enclosure cZ is provided for theprotectionfthereof; I

In the form shownin Figures 3 and 4, the 7 i vnozzle 1S provided. with av cylinder e, the axis of which is'parallel to the axis ,of'the nozzle. Port e. serves as a .means of communicationloetweenthe passagew and the cylinder e and a fitting e is provided. for closing the cylinder.v The piston f i'sprovided j with an enlarged piston rod f to reduce the m uitab e'p e s re withinithe passage a t of ."the fire extinguishing medium.

2o iie d d' 'laims 2g; 7 1 6 nozzle, a" piston: carried by the nozzle fiingl ishing jmedium, and/means to; o r

7 i 2 ystems'comprisinga,nozz1e, ecov r for in pi t furgelit to a normallyv it 7 retr ai c'tediposltion', land imeans'operativelj the nozzle; meansitomount the cover pivY- g,

' volume of airnormally existing backof the piston f as much as possible. 7 v The cover gfis provided W1th a gasket 9' similar to the construction described in connection with Figures 1 and 2 end is mounted pivotallybetvveen the arms 9 Slot 9 1s engaged by a pin f mounted upon-the piston rod. f and transmits the movement of the plsv7 ton to theoover. Upon the, existence off?" piston f lS lllOVGCl totheleft; as shown in I Figured, and the cover is moved plvotally to uncover the: disehtrgefaperture andep] init the free end-unobstructed discharge of Y While the invention hasfheen described in Connection Witlifthe specific constructions V ishow'n in the aceompanying drawings, it is t .notfto'be limited savefas defined in the 'ap'- EV Ic'lairn "as' myinvention y A discharge deviee'for fire extinguishing V I "systems 'eomprising anozzle, a 'e'over for the nozzle, n ie'ans to mount the cover pivotally I and responsive to pressure of the tire ex-' the eover'by-thepistonli 2. Afdis oharge devicejfor firefextinguish ih'e nofzzl'e, .me ans" to mount theico'ver pivotally on 'thenozzle, eieylinder formed in the nozzle I v v and e'Xposedto' pressure of the fire extinguish} ring rnedium, a piston in the eylindena spring onne'eting the piston'tolthel eover. V p V 3.1:A discherge,,device for. fire'extinguish- 111g systems comprising a nozzle, a cover. for,

- [otally ori'the nozzle, a eylinder formed inthe nozzle and exposed topressiireof thefire'ex V tingiii'shinggmedii m}fi pistonin the eylinder', v

.a jpO ItlQIli offlthe'fpistonl extending out of '7 i J ,4 "the "nozzle, a {spring engaging. the pistonto Y a me sdnd portionofthe piston extending 5 onto f the nozzle; r

t nge to a; normally retracted position, j I V rneansoperatlvely conneetingthepiston to theeover,andanenclosure for the oonnect: i

' 411A; ischa e deviefforfire extingflishin'gls'ystemsfjcoinprising a nozzle acoverfori 1 55 nozzle and;responsivetor presslire otthe fire th'e'nozzle,"'means to mount the eover piv otally on the nozzle, 2 piston carried by the extinguishijng';ndediu n, means ur ing the Y flcover to a normally; closed it positlon andl Ineans operatively connecting-the piston with I i 

